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                            <div style="color:gray; word-break: break-all; font-size:12px;">原英文版地址: <a href="https://www.elastic.co/guide/en/elasticsearch/reference/7.7/async-search-intro.html" rel="nofollow" target="_blank">https://www.elastic.co/guide/en/elasticsearch/reference/7.7/async-search-intro.html</a>, 原文档版权归 www.elastic.co 所有<br/>本地英文版地址: <a href="../en/async-search-intro.html" rel="nofollow" target="_blank">../en/async-search-intro.html</a></div>
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<strong>重要</strong>: 此版本不会发布额外的bug修复或文档更新。最新信息请参考 <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/index.html" rel="nofollow">当前版本文档</a>。
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<a id="async-search-intro"></a>运行耗时的搜索 (Long-running searches)
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<p>
Elasticsearch 通常允许你快速搜索大量数据。

有些情况下，搜索会在很多很多的分片上执行，可能是针对 <a class="xref" href="frozen-indices.html" title="Frozen indices">冻结的索引(frozen indices)</a> ，并且跨越多个 <a class="xref" href="modules-remote-clusters.html" title="Remote clusters">远程集群</a>，对于这些情况，不要期望在几毫秒内返回结果。

当你需要执行耗时的搜索时，同步等待其结果的返回并不理想。

相反，异步搜索允许你提交 <em>异步(asynchronously)</em>执行的搜索请求，监控请求的进度，并在稍后阶段检索结果。

你也可以在搜索完成之前检索可用的部分结果。
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你可以使用 <a class="xref" href="async-search.html#submit-async-search" title="Submit async search API">submit async search</a> API 提交异步搜索请求。

<a class="xref" href="async-search.html#get-async-search" title="Get async search">get async search</a> API 允许你监控异步搜索请求的进度并检索其结果。

可以 <a class="xref" href="async-search.html#delete-async-search" title="Delete async search">delete async search</a> API 删除正在运行中的异步搜索。
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